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Commitments and Contingent Liabilities - Schedule of Estimated Accrual Liability (Details) - National Prescription Opioid Litigation - USD ($) $ in Millions | Jun. 30, 2026 | Mar. 31, 2026
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Loss Contingencies [Line Items] |  |
Current litigation liabilities | $ 602 | $ 601
Long-term litigation liabilities | 5,058 | 5,091
Total litigation liabilities | $ 5,660 | $ 5,692

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